"Fix" for [#23621] lattice modifier on particle hair when applied doesn't apply it to the hair

* Although not strictly a bug it is the expected behavior and won't mess anything else up.
* Note: the lattice is applied to the actual hair keys instead of the calculated strands so the applied result will differ a bit from the original.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/editors/physics/particle_edit.c b/source/blender/editors/physics/particle_edit.c
index d491b1a9731..87b20ab1c41 100644
--- a/source/blender/editors/physics/particle_edit.c
+++ b/source/blender/editors/physics/particle_edit.c
@@ -4151,6 +4151,13 @@ static int clear_edited_exec(bContext *C, wmOperator *op)
 			DAG_id_flush_update(&ob->id, OB_RECALC_DATA);
 		}
 	}
+	else { /* some operation might have protected hair from editing so let's clear the flag */
+		psys->recalc |= PSYS_RECALC_RESET;
+		psys->flag &= ~PSYS_GLOBAL_HAIR;
+		psys->flag &= ~PSYS_EDITED;
+		WM_event_add_notifier(C, NC_OBJECT|ND_PARTICLE|NA_EDITED, ob);
+		DAG_id_flush_update(&ob->id, OB_RECALC_DATA);
+	}
 
 	return OPERATOR_FINISHED;
 }